Mflton c



l/ (No Model.) Y l i v Yf, M..G. JONES;

FURNAGE GRATB..

N0.292,492. Patend Jan.29,1l3s4.

- i l Unirse I STATESV PATENT Oratori.v

MILTON C. JONES, OF GREEN ISLAND, NEV YORK.

Fu RN'ACE-GRATE. d

SPECIFICATION forming part ofLetters :Patent N0 292,492, dated January29, 1884.

` Application filed October 23, 1882. (No model.)

To @ZZ whom t may concern:

Be it known that l, MILTON C. JONES, of Green Island,iin the county ofAlbany and State of New York, have invented certain new and usefulImprovements in Furnace-Grate Bars, of which the following is aspecification.

My invention relates to improvements in bars for the grat-es or ire-bedsof boiler and other furnaces; and the object of my improvements is toprovide furnace-bars that will not become warped and bent out of shape.by the heat generated from a superimposed mass of burning fuel; and tothis end my invention consists in securing the forward end of eachgrate-bar in a fixed position, so' that it cannot be moved bytheexpansion and contraction of it, the rear end of each of said bars beingfitted to rest in a chambered bearing-bar pro` vided with a series ofopenings for receiving the grate-bars and maintaining them inp'ositionto resist any tendency to warp and twist, the said chamberedbearing-bar being spe cially adapted to permit the grate-bars to expandfreely in a lengthwise direction without encountering' any obstructionat their rearmost end, and by so doing I avoid themost frequent cause ofwarping and bending in grate-bars.

In the accompanying drawings, which form part of this specification, andto which reference is made herein, Figure lis a perspective longitudinalsection of a boiler-furnace containing my improvements; Fig. 2, a frontelevation of the chambered bearing-ba15-and Figs. 3, 4, and 5 aredetached details of an intermediate bearing-bar and a grate-bar adaptedto engage over standingears formed on the said bearingbar.

As represented in the drawings, A is the front plate of a furnace; B,the brick-work at sides of furnace, C, the bridge-wall, D, thedead-plate7 at the forward end of the furnace; E, grate-bars; F, thefront bearingbar; G, the rear or chambered bearingbar, and H anintermediate bearing-bar.

The front plate, A, brick-work B, and deadplate D may all be constructedin any of the usual and well-known forms for such parts.

The grate-bars E are made of a uniform depth and of a uniformcross-sectional form. At their forward end they have either a curved orangular termination, so that their upper.

ends may fit snugly against the'inner edge of the dead-plate D. Each ofsaid bars has a series of triangular spacing-snags, c, which are formedat each side and, as shown in Fig. 1, near its lower edge. under edge ofthe bar at the base of the foremost snug e, is adapted to engage on thesharp en ed upper edge ofthe front bearing-bar, F, in such manner thatthe forward end of each grate-bar will be retained thereby and preventedfrom being moved by the expansion and "contraction of the bars, whichwill only affect the barsat the parts lying at'the rear of the front'bearing-bar, F. While I have shown and described only one mode oflocking the forward end of said grate-bars to the front bearing-bar, itwill be. obvious to any one oonversant with such'constructions that manydevices for effecting the same purpose in substantially the same mannermay be substituted therefor. 4

rlvhe rear bearing-bar, G, is made in the forni of an open-sided boX,having its open side at the rear. It has an upper iiange, g, a lowerange, g', and a vertical face, g2, the latter being provided with aseries of openings, g3, that are made to conform to the cross-section ofthe grate-bars E, and into which the rearmost ends of the grate-barswill slide freely and be maintained in their proper erect position. Anopen-sided chamber, g, is formed in the bearing-bar G at the rear endsof the grate-bars E, so that the latter will be left free toeXpandendwise in a rearward direction without meeting any obstructionv thatwould cause said grate-bars to become bent and contorted.

The intermediate bearing-bar, H, may be made of the usual form, (shownin Fig. 1,) whereon the grate-bars will simply rest;l oras I preferablymake it-the said bar may be provided on its upper face with a series oftriangular ears, h, as shown in Figs. 3 and 4. ySaid ears mustcorrespond in number and position 'to the gratebars, so that eachear'will engage in a recess, e?, formed in the lower edge of eachgrate-bar. The said recesses are elongated so as to permit the grate-barto expand lengthwise; but they are fitted to bear sidewise on the earsh, so as to aid in retaining the gra-tebars in shape and position.

The bridge-wall C is built on the top of the A notch, e', out in the,

IOS

bearing-bar G in such manner that the front face of said Wall willproject about two inches over the front of said bearing-bar. By thismeans a protection from the heat is formed for the bearing-bar G, andashes are thereby prevented from passing,` through the openings y intothe chamber g4, wherein an accumulation of such ashes might proveharmful.

I claim as my invention- 1. The chambered bearing-bar G, consist ing ofan open-sided box, composed of the upper flange, g, lower flange, g',and vertical front plate, gi', the latter containing a series ofopenings, g, which conform to the shape and number of the grate-bars E,and which will permit said grate-bars to expand endwise therein, butwill prevent the ashes from e11- tering the chamber gt, as hereinspecified.

2. The combination, with the grate-bars E, having' their forward endslocked in a iixed position, as herein described, of the chainbcredbearing-bar G, consisting of an opensided box, constructed as hereindescribed,

and having its vertical front plate, g2, provided with a series ofopenings, g, for containing the movable ends of said grate-bars, andadapted to exclude the ashes from the chamber g, as herein specified.

The combination, with a grate-bar, E, adapted to be locked in a ixedposition at one end, and provided in its under dge with a slottedrecess.` el, as herein described, of a bearing-bar, H, having on itsupper facease ries of ears, 71 adapted to engage in the recesses c2 ofsaid grate-bars, in the manner and for the purpose herein specified.

4. The combination, with the chambered bearing-bar G, as hereindescribed, of the bridge'wall C, erected directly upon the upper flange,f7, so as to overhang the forward face, g2, of said bearing-bar, as andfor the purpose specified.

MILTON (l. JONES.

Yl'itnesses:

WILLIAM 1L Low, A. F. Lon'.

